Ncle exam stuvia - Study guides, Class notes & Summaries

posterior apecal radius - ANSWER-this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - ANSWER-occurs when the posterior radius of curvature is decreased (i.e. 8.4 to 8.1 mm) flatter base curve - ANSWER-occurs when the posterior radius of curvature is increased (i.e.8.1 to 8.4 mm) bicurve lens - A...

NCLE Basic Exam Study Guide 2024 with Complete SolutionsNCLE Basic Exam Study NCLE Basic Exam Study Guide 2024 with Complete SolutionsNCLE Basic Exam Study Guide 2024 with Complete SolutionsGuide 2024 with Complete Solutions Diffused Illumination - ANSWER--Uses widest slit, longest aperture -Light source positioned at an angle of 40º-50º -Used to view overall areas, to observe the ocular adnexa, cornea, sclera, lids, conjunctiva, lens surface, and CL fitting characteristics Direct Illumi...

NCLE Prep Exam Part 1 of 4 with Complete SolutionsNCLE Prep Exam Part 1 of 4 with Complete SolutionsNCLE Prep Exam Part 1 of 4 with Complete SolutionsNCLE Prep Exam Part 1 of 4 with Complete Solutions Which of the following medications may affect successful contact lens wear? A. Antacids B. Antihistamines C. Aspirin D. Laxatives - ANSWER-B. Antihistimines Which term refers to a sensitivity to light? A. Prebyopia B. Photophobia C. Pannus D. Ptosis - ANSWER-B. Photophobia The follo...

Glossary NCLE Exam Questions and Answers 100% Accurate Glossary NCLE Exam Questions and Answers 100% Accurate Glossary NCLE Exam Questions and Answers 100% Accurate Glossary NCLE Exam Questions and Answers 100% Accurate Accommodation - ANSWER-The ability of the crystalline lens to adjust power to provide retinal focus of images of objects closer than optical infinity Aphakia - ANSWER-Absence of the crystalline lens. Astigmatism - ANSWER-A refractive defect where the refractive su...

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Diffused Illumination - ANSWER--Uses widest slit, longest aperture -Light source positioned at an angle of 40º-50º -Used to view overall areas, to observe the ocular adnexa, cornea, sclera, lids, conjunctiva, lens surface, and CL fitting characteristics Direct Illumination - ANSWER--Most important/useful illumination -Light source positioned at an angle of 40º-50º to oculars -Light beam and oculars are focused in coincidence on area being evaluated -The difference in the illumination...

The posterior optical zone will directly affect the lens to cornea relationship of a rigid gas permeable lens. If the posterior optical zone is steepened, it will increase the sagittal depth. If it is flattened, it will decrease the sagittal depth. Changing the power, which is accomplished by changing the anterior optical zone, will not affect the sagittal depth of the lens, nor will changing its edge design. - ANSWER-1. The sagittal depth of a rigid gas permeable contact lens can be altered wit...

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What is the Secondary/intermediate curve? - Answer The curve on the posterior side of the contact lense between the base curve and peripheral curve. Usually 0.7mm to 1.6mm flatter than the base curve radius. The width is affected by the OZ diameter and peripheral width. What is the peripheral curve? - Answer The outermost curve on the posterior side of the contact lens. It clears the flatter periphery and prevents lens impingement in the limbal areas What measurements effect the size of th...